Petapa's 2026 population is now estimated at 151,154. In 1994, the population of Petapa was 12,949. Petapa has grown by 2,947 in the last year, which represents a 1.99% annual change. These population values and projections come from CityPopulation Guatemala cities and towns census series (1994, 2002) fallback access, INE Guatemala Censo 2018 A1.2 municipio urban population and World Population Review Internal Projections .